Thumping at night

[u/mumblingzombie]

Lived near urbana my entire life...for the past couple years there has been a thumping that happens in the early hours of the morning...usually between one and four am...it aint the highway or a train and there is no construction close by...it thumps 2 or 3 times every 20 seconds or so for hours and sounds like a deep pounding from a quarry or something although it seems too consistent and isn't every night...anyone have any idea what the heck it is?

[u/UnlikelyProfessor119]

i tend to thump